Additive Manufacturing in Industry

Roberto Citarella,Venanzio Giannella

doi:10.3390/app11020840

Abstract

The advent of additive manufacturing (AM) processes applied to the fabrication of structural components has created the need for design methodologies and structural optimization approaches that take into account the specific characteristics of the fabrication process. While AM processes give unprecedented geometrical design freedom, which can result in significant reductions in the components’ weight (e.g., through part count reduction), on the other hand, they have implications for the fatigue and fracture strength, because of residual stresses and microstructural features. This is due to stress concentration effects, anisotropy, distortions and defects whose effects still need investigation. This Special Issue aims at gathering together research investigating the different features of AM processes with relevance for their structural behavior, particularly, but not exclusively, from the viewpoints of fatigue, fracture and crash behavior. Although the focus of this Special Issue is on AM, articles dealing with other manufacturing processes with related analogies can also be included, in order to establish differences and possible similarities.

Highlights

Modelling and optimizing structural behavior by using advanced materials and manufacturing processes is nowadays a key task for the engineering scientific community [1]
The tests were simulated according to Euro New Car Assessment Program (NCAP), and the main biomechanical parameters required by the Euro NCAP were estimated for both the current and the additive production of the component
The effect of heat input on the formability, microstructure, and properties of the wire arc additive manufacturing (WAAM) alloy was investigated, and the results show that Al–7Si–0.6Mg alloy has a large processing window under the cold metal transfer (CMT) process, and it can be effectively formed with a large range of heat inputs

Summary

Introduction

Modelling and optimizing structural behavior by using advanced materials and manufacturing processes is nowadays a key task for the engineering scientific community [1]. The concept of creating 3D geometries by growing them one layer at a time was an appealing idea that unlocked more than thirty years of innovation in materials, processing, design, and controls. Though AM was invented to rapidly produce prototypes, the technology has the capability to release the design and manufacturing constraints in creating innovative products with great geometrical complexity [2].

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